Abstract: A valve with proof of closure includes a valve body with a first port and a second port separated by a valve member that is biased toward a closed position. A piston is mounted within a pressure chamber with a pressure fluid port for connecting to a source of pressurized fluid. Piston is biased toward a retracted position and is moved to an extended position in response to pressurized fluid entering through pressurized fluid port. A control member is attached to valve member and is engaged by piston as it is moved a first distance from retracted position toward extended position. A valve position indicator with a closed state and as open state is biased toward the closed state and is actuated by piston as piston moves a second distance from retracted position toward extended position to move valve position indicator from closed state toward open state.

Abstract: There is provided a double closure orifice fitting having an orifice fitting body and a valve carrier sized to be installed within a valve cavity. The body of the valve carrier has an actuator surface on the bottom, retainer clip recesses formed in the first and second end, one or more spring members extending from the top, and a valve strip having retainer clips that is removably attached above the top of the valve carrier body and against the spring members by engaging the retainer clip recesses and the retainer clips such that the retainer clips are held in tension by the one or more spring members. The valve carrier is movable between an open position spaced laterally from the passageway and a sealed position such that the valve strip sealingly engages the valve cavity to seal the passageway by an actuator that engages the actuator surface.

Abstract: There is provided a double closure orifice fitting having an orifice fitting body and a valve carrier sized to be installed within a valve cavity. The body of the valve carrier has an actuator surface on the bottom, retainer clip recesses formed in the first and second end, one or more spring members extending from the top, and a valve strip having retainer clips that is removably attached above the top of the valve carrier body and against the spring members by engaging the retainer clip recesses and the retainer clips such that the retainer clips are held in tension by the one or more spring members. The valve carrier is movable between an open position spaced laterally from the passageway and a sealed position such that the valve strip sealingly engages the valve cavity to seal the passageway by an actuator that engages the actuator surface.

Abstract: A valve with proof of closure includes a valve body with a first port and a second port separated by a valve member that is biased toward a closed position. A piston is mounted within a pressure chamber with a pressure fluid port for connecting to a source of pressurized fluid. Piston is biased toward a retracted position and is moved to an extended position in response to pressurized fluid entering through pressurized fluid port. A control member is attached to valve member and is engaged by piston as it is moved a first distance from retracted position toward extended position. A valve position indicator with a closed state and as open state is biased toward the closed state and is actuated by piston as piston moves a second distance from retracted position toward extended position to move valve position indicator from closed state toward open state.